[] (28 April 2003) has the diagrama with all dimensions and weights. Works numbers were 574-578 in 1943, 579-588 in 1944, 589-592 in 1945, and 593, 616-617 in 1946.
Among the biggest locomotives to operate in Europe, these were delivered by the Barcelona works of Maquinista Terrestre Y Maritima in 1943. The boiler and firebox had heating surfaces identical to those of the 4-8-4 that entered service fourteen years later (Locobase 1130). Equipped with the Walschaert-driven oscillating cam gear and a Krauss truck that combined the first two driving axles.
Tonnage rating was 2,300 tons up a 1/2% grade at 12 mph. On a 2 1/2% grade they could pull 600 tons. In Lineas Del Tren (#290, 5 May 2003) [Por que llegaron a Espana las 1-4-1 Mikados francesas? reproduced on [], accessed 7 Dec 2005], Angel Maestro credits this class with 1,200 tons over a relatively easy profile between Venta de Banos and Valladolid.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 151-3101 |
| Locobase ID | 2456 |
| Railroad | RENFE |
| Country | Spain |
| Whyte | 2-10-2 |
| Number in Class | 20 |
| Road Numbers | 5001-5020 |
| Gauge | 5'6" |
| Number Built | 20 |
| Builder | MTM |
| Year | 1943 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 23.62 / 7.20 |
| Engine Wheelbase (ft / m) | 44.29 / 13.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.53 |
| Overall Wheelbase (engine & tender) (ft / m) | 72.83 / 22.20 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 46,299 / 21,000 |
| Weight on Drivers (lbs / kg) | 231,495 / 105,000 |
| Engine Weight (lbs / kg) | 308,647 / 140,000 |
| Tender Loaded Weight (lbs / kg) | 138,890 / 63,000 |
| Total Engine and Tender Weight (lbs / kg) | 447,537 / 203,000 |
| Tender Water Capacity (gals / ML) | 7440 / 28.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8.80 / 8 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 77 / 38.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 61.40 / 1560 |
| Boiler Pressure (psi / kPa) | 232.10 / 1600 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 22.4" x 29.5" / 570x750 (3) |
| Tractive Effort (lbs / kg) | 71,340 / 32359.32 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.24 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 150 - 2.17" / 55 |
| Flues (number - dia) (in / mm) | 48 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 20.75 / 6.30 |
| Firebox Area (sq ft / m2) | 281.37 / 26.15 |
| Grate Area (sq ft / m2) | 57 / 5.30 |
| Evaporative Heating Surface (sq ft / m2) | 3160 / 293.70 |
| Superheating Surface (sq ft / m2) | 1516 / 140.90 |
| Combined Heating Surface (sq ft / m2) | 4676 / 434.60 |
| Evaporative Heating Surface/Cylinder Volume | 156.57 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 13,230 |
| Same as above plus superheater percentage | 17,463 |
| Same as above but substitute firebox area for grate area | 86,204 |
| Power L1 | 21,431 |
| Power MT | 1020.48 |